The study consists of 20-30 patients with pancreatic cystic neoplasms. The patients enrolled in the study will be imaged by MDCT, MRI combined with magnetic resonance cholangiopancreatography (MRCP), endoscopic retrograde cholangiopancreatography (ERCP) and 18F-FDG-PET-CT followed by surgery or follow-up. The data will be collected between 2011 and 2013.